User Contributed Notes 4 notes

Unlink refers to the underlying UNIX command, unlink, which removes the symbolic or hard link to the file, not necessarily the file itself. The file is only removed when all links to the file are removed.

A "dummy entry" is a "fake" entry or, in this case, an entry for a command that does not actually exist, so that people can find the correct one. The word "dummy" is used in the same way as in the expression "a tailor's dummy", which is a fake person used to stand in for a real client so that they can see the results of the work.